Hey guys. Coming over from the e21 section. I am currently searching for the cleanest way to put an electric speedometer into my e21 gauge cluster due to having an e30 m20b25 turbo swap and medium case diff swap. I was curious on what size diameter the e23 speedometer is? The e28 and e30 gauges are smaller than the e21 which doesn't look right and requires cutting the cluster which I dont want to do. So, I am hoping the e23 gauge is the correct size I need. If someone could measure the diameter of their speedometer for me that would be awesome. Thanks!
In for any info. I've been pondering this shit about my E21 all day and then I find someone else is too! Rock on! How long have you owned your E21?
Was there ever any update on this? e28 clock is 4.5"
E28 is the same size as the E23.
--Jay3->Sic gorgiamus allos subjectatos nunc
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What about an early e23 speedo, with the the speedo in the middle. The one I have looks bigger and measures bigger from the outside of the front glass compared to measuring the same way on a later one.
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